题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001935-92697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001935-72580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001936-19948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001936-67649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001936-59349.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001936-17506.png)
解析
试题分析:由题意,由余弦定理
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001936-50410.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001937-77107.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001930-10291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001930-77756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001931-45158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001931-38044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001931-56136.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001924-30793.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001924-16974.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001924-12514.png)
(2)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001924-87253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001915-19824.png)
在直线AB的两侧).当
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001915-94696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001906-12780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001907-91484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001907-33384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001907-75353.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001907-12228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001857-13375.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001857-68868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001857-12767.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001857-86311.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001858-54026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001858-62781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001858-21932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001858-66694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001859-91961.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001858-21932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001859-68896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001859-68896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001859-91356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020001859-30290.png)
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